Chromium is most commonly mined in the form of chromite, which has the chemical formula fecr2o4. calculate the percent by mass of each element in chromite, and give your answers to four significant digits.

Question

Chemistry

Gavyn Humphrey

19 July, 03:24

Chromium is most commonly mined in the form of chromite, which has the chemical formula fecr2o4. calculate the percent by mass of each element in chromite, and give your answers to four significant digits.

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Answers (1)

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Adriel Lloyd · Answer 1

Fe atomic mass = 55.86 * 1 = 55.86 Cr atomic mass = 52 * 2 = 104 O atomic mass = 16 * 4 = 64 Total molecular mass = 223.86 Percent by mass Fe = (55.86/223.86) * 100 = 24.95% Percent by mass Cr = 46.45% Percent by mass O = 28.59%